Dredger for pulverulent material.



No. 633,94l. 4 Patented Sept. 26, I899.

J. w. ABBOTT, In.

DBEDGER FUR PULVER ULEHT MATERIAL.

{Application filed. 1hr. 21, 1B9 9.

(-No Modal.)

WITNESSES INVENTOR rm: ncmms Pzrtns 00.. micro-Lumen. wAsmNGroN. D. c..

5o 2 is a topview of the same.

- a citizen of the United States, residing at Allea handle of convenientlength by which it is I a longitudinal sectional view of a dredger con-UNITED "STAT S PATENT OFFICE? Y i JAMES wnnaorr, JR, or ALLEGHENY,PENNSYLVANIA} DREDG ER FOR- PU LVERU LENT' MATERIAL.

SPECIFICATION forming part Of Letters Patnl'l N0. 633,941, datedSeptember 26, 1899.

7 Application filed March 21,1399. Serial No. 709,945. (No model.)

To all whom it may concern: I Be it known that I, J AMES W. ARROTT,'JY.,

gheny, in the county of Allegheny and State of Pennsylvania, haveinvented certain new and usefullmprovements in Dredgers for PulverulentMaterial; and I do hereby. declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention has relation to articles used for sifting anddistributing powdered enameling material on the surface of bath-tubs andother vessels, commonly known to the trade as dredgers. v

The ordinary dredger consists simply of a sieve or other screen ofproper mesh having held and manipulated. As the pulverulent materialdoes not freely pass through the sieve or evenly distribute itselfspontaneously, it is necessary in dredging to continually agitate thedredger with the hand or with some instrument held in the hand bytapping or striking the dredger or by striking the dredger against theedge of the article to be enameled. Thisrenders the labor of dredging orsifting very tiresome and slow and requires considerable skill inmanipulating the dredger so as to insure an even delivery of theenameling material. l

The object of this invention is to provide an automatic tapper oragitator which will deliver a succession of rapid blows against the.side or end of the dredger and while relieving the workman of a greatdeal of labor causes the pulverulent material or powder to be evenlydistributed and to be uniformly discharged. The device which I employfor this purpose is preferably a pneumatichammer, the piston or plungerof which is elongated and fitted to the hollow handle of the dredger, soas to reciprocate within the latter and strike the endor side of thedredger with every for.- ward stroke.

In the accompanying drawings, Figure 1 is structed according to myinvention, and Fig.

A designates the sieve or sifter, consisting of a box-like receptacle ortrough having a wire-cloth screen at the bottom,through which theenameling material is shaken.

B designates a tubular handle consisting of a section of pipe attachedto the end of the sift-er. r

. Odesignates the body or casing of the push- -matic hammer, coupled tothe end of the handle'and of any suitable construction. 7 The piston ais either extended through the handle or is connected to a rod (1, which013-" crates in unison with the piston and which may be formed withenlargements at the ends to lit the bore of the handle and V the end ofthe casing. The end of the handle next to' the vdredger is plugged toreceive the stroke of the rod or piston. Y The air-tube F, lead-V ingfrom a compressed-air reservoir G, which is preferably flexible, iscoupled to the outer end of the-casing, and a snitablevalve E isprovidedwithin easy reach 'of" the workman to control the admission ofair'and regulate the force of the blow. I

By the use of this device the operator is enabled to distribute anddeposit the enamel more quickly and evenly and has the use of both handsto carry and manipulate the dredger, relieving him of a great deal ofhard work and enabling him to turn out more work ina given time than ispossible by the use of the present style of dredg'er.

I amaware that jarring or vibrating devices have been usedin stationaryapparatus used for sifting materials, and I disclaimany application ofmy invention'to such purposes;

in one hand, while the necessary jar to produce sifting wascommunicatedeither to the handle of the sifter or to the sifter itself by someinstrument in the other hand, or in some instances the sitter is held inboth hands by one operator, while an assistant produced the necessaryjar to cause sifting, and it is to this class of apparatus andoperations that my invention relates and applies.

The pneumatic hammer forming part of the agitator is of the ordinary andwell-known dredger and adapted to agitate or vibrate the same,substantially as described.

3. A dredger orsifter comprising a sieve and handle and an automaticagitator secured thereto with means for controlling the operation ofsaid agitator, substantially as described.

In testimony whereof I aifix my signature in presence of two witnesses.

JAMES W. ARROTT, JR.

\Vitnesses:

GEO. W. CRAIG, E. F. GREGG.

